Anyone on the 3db SNRM yet?

Some reports on another forum.

Some appear to be popping up on MyDslWebStats

Also, it makes no difference whether you're on an ECI or Huawei cab, too.

Edited by deleted (Sun 17-Apr-16 19:12:41)

why is there a NDA on this?

openreach have a monopoly its not as if there is a competitor to take advantage of it.

Also is the NDA openreach side or the CP side?

Edited by Chrysalis (Sun 17-Apr-16 17:44:04)

Was there ever an official declaration about the BT Wholesale ADSLx one getting 3dB?

There isn't an NDA. I'm just not sure what I'd be allowed to say. I don't know what's in the public domain and what isn't, best to only say what people will figure out of their own accord.

But back to the SNR, it can be 3dB, 4dB or 5dB. It doesn't have to jump right down to 3. It'll depend on the line. Obviously if your line is already on 10dB or higher it seems unlikely you'd ever see any benefit from this trial, DLM won't suddenly reduce the SNR to under 6 just because you happen to be in a trial area.

In reply to a post by RobertoS:

Was there ever an official declaration about the BT Wholesale ADSLx one getting 3dB?

I don't believe there was, no.

Edited by deleted (Sun 17-Apr-16 17:49:30)

People should understand you are essentially leaking confidential information that could result in someone losing their job or being prosecuted.

thanks for confirming on the NDA.

In terms of what you are allowed to say obviously I wouldnt say anything because it seems an industry wide expectation to keep all this hush hush, and you dont want to lose your job over it.

There's nothing wrong with leaving little crumbs and letting people figure things out themselves. Sometimes they'll get it wrong sometimes they'll be spot on.

I guess that if the 3dB (4dB, 5dB) setting causes trouble and people raise a fault, it will be removed and the 6dB setting will be re-instated in much the same way that the g.inp ECI rollout was

IIRC my 6dB SNRM never goes above 6.3dB and rarely as low as 5.9dB. Seems to sync at 6.1dB

On ADSL2+ it varied by ~3.5dB over every 24 hours, with the phone in use taking another 1.5dB.

Not on a 3db SNRM.

But today I noticed my attainable rate had gone up to 75000kbps, so done a reboot.

SNYC went up to 72187kbps from 65453kbps with the SNRM dropping from 6.4db to 4.8db. Attainable rate has now dropped to 65276kbps but SYNC and SNRM are unchanged.

xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 22534 Kbps, Downstream rate = 65276 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 72187 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3959)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3959)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 22534 kbps 65276 kbps
Actual Aggregate Tx Power: 6.8 dBm 13.4 dBm
==============================================================
VDSL Band Status U0 U1 U2 U3 U4
D1 D2 D3
Line Attenuation(dB): 3.8 20.1 30.3 N/A N/A 11.1 26.5 40.5
Signal Attenuation(dB): 3.8 19.3 29.2 N/A N/A 12.4 26.2 40.4
SNR Margin(dB): 6.6 6.6 6.5 N/A N/A 4.7 4.7 4.7
TX Power(dBm): -5.3 -23.3 6.4 N/A N/A 10.4 7.8 7.0

Just Noticed this in my HG612 Modem Log Stats Viewer
17/04/2016 11:40 65453 19999 6.4 7.1 13.3 6.8 64848 22080
17/04/2016 11:41 65453 19999 8.2 7.8 13.3 6.8 71236 22825
then after a reboot
17/04/2016 12:40 65453 19999 8.2 7.7 13.3 6.7 71236 22902
17/04/2016 12:46 72187 19999 6.2 7.3 13.4 6.7 71670 22906
then later
17/04/2016 13:51 72187 19999 6.3 7.3 13.4 6.7 71212 22812
17/04/2016 13:52 72187 19999 4.9 6.5 13.4 6.7 66192 22530
Now
18/04/2016 00:53 72187 19999 4.7 6.6 13.4 6.8 65276 22534

Stats off the HG612 Modem log stats viewer

This information shows the latest ONGOING stats obtained at 00:53 on 18/04/2016
________________________________________________________________

actual_t_of_day = 1460937181 i.e. Mon Apr 18 00:53:01 2016

AS = 43623

time of resync (actual_t_of_day - AS) = 1460893558 i.e. Sun Apr 17 12:45:58 2016


Connection up time: 0 days 12 hours 7 minutes & 3 seconds Last Resync recorded at 17/04/2016 12:46

Firmware version: A2pv6C038m.d24j Retrain Reason: 0
________________________________________________________________

Downstream Upstream Downstream Upstream


Sync (kbps) 72187 19999 Interleaving 8 1
Attainable rate (kbps) 65276 22534 INP 48.00 0.00
Attenuation (dB) 16.2 0.0
SNR Margin (dB) 4.7 6.6
Power (dBmV) 13.4 6.8 SES (total) 0 0
RSUnCorr errors (delta) 0 0 RSUnCorr errors (total) 0 0
Errored seconds (delta) 0 0 Errored seconds (total) 0 110
Bitswaps (delta) 39 0 Bitswaps (total) 32200 133
CRC errors (delta) 0 0 CRC errors (total) 0 131
HEC errors (delta) 0 0 HEC errors (total) 0 0
FEC errors (delta) 48 0 FEC errors (total) 29899 522

Thing the FEC are a bit higher than usual, don't know if that is good or bad for 12 hrs.

Will keep an eye on it and see if the SNRM gets better or worse.

Latest Speedtest

Edited by Scottish_Pete (Mon 18-Apr-16 01:16:47)

This is all FTTC or only BT?

Still on talktalk till the switch on thursday

i'm on 11.9db right now.

In reply to a post by epyon:

This is all FTTC or only BT?

Still on talktalk till the switch on thursday

i'm on 11.9db right now.

What are you syncing at?

In reply to a post by epyon:

This is all FTTC or only BT?

Still on talktalk till the switch on thursday

i'm on 11.9db right now.

FTTC connections are managed by Openreach. This has nothing to do with who your service provider is.

Any idea if the 3dB one is available on the super-stable option the CPs have? It would make sense for it not to be, but ....

DSL synchronization status:
Up
Connection status:
Showtime
WAN IP Address:
92.19.xxx.xxx
Primary DNS Server:
62.24.243.1
Secondary DNS Server:
62.24.128.196

Line Quality

Upstream line rate (kbit/s):
20000
Downstream line rate (kbit/s):
79999
Upstream noise safety coefficient (dB):
10.1
Downstream noise safety coefficient (dB):
11.1
Upstream interleave depth:
0
Downstream interleave depth:
0
Line standard:
VDSL
Upstream line attenuation (dB):
12.5
Downstream line attenuation (dB):
7.4
Upstream output power (dBm):
-2.5
Downstream output power (dBm):
13
Downstream interleave depth:
None
DSL up-time:
25 days 0 hours 38 minutes 36 seconds


right now

Alright thanks.

ment to reply to Icaras

Edited by epyon (Mon 18-Apr-16 14:39:20)

A 3dB target will not affect you (at present). With your short line the max achievable is up in the 80s and thus the 10dB reflects that.

In reply to a post by RobertoS:

Any idea if the 3dB one is available on the super-stable option the CPs have? It would make sense for it not to be, but ....

Great question, I don't know the answer to it. Don't Sky use the super stable option though? Will just have to wait for reports from users to come in, and look out for Sky users.

sky use standard (the middle option), there is no super stable profile on FTTC.

But RobertoS has raised a very good question, as it would make sense for the DLM to be configured to not allow the stable profile to use a 3db snrm.

I couldn't be bothered searching to remind myself which system uses Standard, Stable and Super stable, and which uses Speed, Standard and Stable, but thanks . Now you say it I seem to recall OR is the latter, with BTW the former.

I think the answer to the question though will come out from stats turning up on the dslstats website. Possibly also on samknows, but we won't see many of those.